The personal stake of the three university officials in the company, now known as Student Loan Xpress, is the latest revelation in an expanding investigation by Attorney General Andrew M. Cuomo of New York into the relationships between student loan companies and universities. Student Loan Xpress is one of the “preferred lenders” recommended at all three universities.

Government filings show that the three officials sold shares in a stock offering by the parent company of Student Loan Xpress in 2003 and held additional stock options in the company, known as Education Lending Group. One of the officials made more than $100,000, according to documents and lawyers in Mr. Cuomo’s office. In one case, that of Texas, the official says he was invited to invest in the company.